CVE-2022-25226: Cybelsoft Thinvnc

Critical severity, CVSS 10.0. EPSS: 11% chance of exploitation in the next 30 days.

ThinVNC version 1.0b1 allows an unauthenticated user to bypass the authentication process via 'http://thin-vnc:8080/cmd?cmd=connect' by obtaining a valid SID without any kind of authentication. It is possible to achieve code execution on the server by sending keyboard or mouse events to the server.

Affected products

• Cybelsoft Thinvnc: version 1.0 only

Published 2022-04-18. Last modified 2026-06-17.